問題詳情

(23~25) Every September 22, which is called Car Free Day, people around the world get out of their cars and get ontheir bikes to experience what our cities might look like, feel like, and sound like without cars. This is the mostcommon way in which people celebrate Car Free Day.  Bicycles have a long history. People 23 bicycles to work or school before cars were invented. In fact, thefirst bicycle-like machine appeared in 1817. At that time it 24 have a small back wheel and a big front wheel.Today there are many kinds of bicycles. 25 , mountain bikes are strong for riding on a mountain road. Also, inmany cities special roads are built only for bicycles, which help bicycle riding become a hot activity.phpo7vIQq invent 發明；wheel 輪子
23.
(A)have ridden
(B)ride
(C)had ridden
(D)will ride

參考答案

答案：C
難度：適中0.5
統計：A(0),B(0),C(0),D(0),E(0)

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